Harvey Birdman Attorney at Law is primarily an interactive story that the player participates in, rather than a challenge-based game that needs to be won. Each case is a self-contained story, incorporating the characters, settings, and most importantly, the off-beat humor that Harvey Birdman fans have come to expect.

Over the course of the game, players must guide Harvey through a series of odd and comical cases. In order to prove his client?s innocence, Harvey must explore the scene of the crime, gather evidence, talk with other cartoon characters, occasionally have drinks with opposing council, and of course, tear holes -- no matter how ridiculous -- in the testimony provided by the witnesses for the prosecution.